| 摘要 |
PURPOSE:To obtain a casting in which fine particles for strengthening is uniformly dispersed by pouring a molten metal onto the fine particles for reinforcement placed in the sleeve of dies, introducing the molten metal mixed under stirring with the fine particles into the product cavity and pressurizing the molten metal. CONSTITUTION:Dies 1, 2 are clamped and the gate 9 of a product cavity 3 is closed by the tip 8 of a counter plunger 6. While a pressurizing plunger 5 is held pulled up, fine particles for strengthening are charged through a pouring port 10 onto the counter tip 8 in a sleeve 4 and the fine particles for strengthening are stirred by a molten metal 12 poured into the dies, so that the fine particles are suspended in the molten metal 12. The tip 8 is immediately thereafter lowered to introduce the molten metal 12 into the cavity 3. When about 1/4-1/3 of the molten metal 12 is introduced into the cavity, the molten metal 12 is pressurized by the plunger 5 to fill the molten metal into the cavity 3. The casting in which the fine particles for strengthening are uniformly dispersed is thus obtd. |
